Inversion of Magnetometric Data in the Presence of Remanent Magnetization

Document Type : Research - Paper

Authors

1 Ph.D, Dept. of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran

2 Associate Professor, Dept. of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran

Abstract

Remanent magnetization is impossible to ignore in many applications of magnetic method including mineral exploration particularly iron ore, geomagnetism, regional investigation, and archaeological measurements. Magnetization vector inversion has made great attention in recent years since both distribution of the magnitude and direction of the magnetization have been obtained, therefore, it is easy to distinguish between different bodies especially when magnetic data are affected by remanent magnetization. In this research, the magnetization vector inversion (MVI) has presented: a 3D magnetic modelling is proposed from surface measurements to obtain magnetization distribution. The equations have solved in data-space least square to reduce computer memory requirements and speed up calculations. The algorithm has included the combination of three weights as depth weighting, distance weighting and compactness weighting in Cartesian direction. The method has been validated with a synthetic example including a dipping dyke and the results are acceptable compare with true magnetic anomaly.

Keywords

Main Subjects

References

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History

  • Receive Date: 16 February 2021
  • Revise Date: 06 September 2021
  • Accept Date: 30 May 2021

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